RGT 2911 Ch 8

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Author:
ethinsmom
ID:
192173
Filename:
RGT 2911 Ch 8
Updated:
2013-01-10 22:12:01
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Radiation Biology
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Radiation Biology Chapter 8
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  1. Which of the following is (are) a feature(s) of x-ray equipment, designed especially to eliminate unnecessary radiation to the patient?
    1. Filtration
    2. Minimum SSD of 12 inches
    3. Collimator accuracy

    A. 1 only
    B. 1 & 2
    C. 1 & 3
    D. All 3
    D
  2. The quality assurance term used to describe consistency in exposure at adjacent mA stations is:

    A. Automatic exposure control
    B. Positive beam limitation
    C. Linearity
    D. Reproducibility
    C
  3. How does filtration affect the primary beam?

    A. Filtration increases the average energy of the primary beam.
    B. Filtration decreases the average energy of the primary beam.
    C. Filtration results in an increased patient dose.
    D. Filtration increases the intensity of the primary beam.
    A
  4. Patient dose is affected by:
    1. Inherent filtration
    2. Added filtration
    3. Source-image distance

    A. 1 only
    B. 1 & 2
    C. 1 & 3
    D. All 3
    D
  5. Which of the following groups of exposure factors will deliver the greatest amount of exposure to the patient?

    A. 20 mAs, 100 kV
    B. 40 mAs, 90 kV
    C. 80 mAs, 80 kV
    D. 160 mAs, 70 kV
    D
  6. The principle function of x-ray beam filtration is to:

    A. Reduce operator dose
    B. Reduce patient skin dose
    C. Reduce image noise
    D. Reduce scattered radiation
    B
  7. Patient dose can be decreased by using:
    1. High-speed film and screen combination
    2. High-ratio grids
    3. Air-gap technique

    A. 1 only
    B. 1 & 2
    C. 1 & 3
    D. All 3
    A
  8. Which of the following are included in the types of gonadal shielding?
    1. Flat contact
    2. Shaped (contour) contact
    3. Shadow

    A. 1 only
    B. 1 & 2
    C. 2 & 3
    D. All 3
    D
  9. The advantages of beam restriction include:
    1. Production of less scattered radiation
    2. Irradiation of less biologic material
    3. Patient shielding will not be required

    A. 1 only
    B. 1 & 2
    C. 2 & 3
    D. All 3
    B
  10. A backup timer for the automatic exposure control device serves to:
    1. Protect the patient from overexposure
    2. Protect the x-ray tube from excessive heat
    3. Eventually increase inherent filtration

    A. 1 only
    B. 1 & 2
    C. 1 & 3
    D. All 3
    B

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